Will be doing a renovation and hiring a PE to double check all this, but interested in thoughts first (for budgeting!): we are not sure if this is a load bearing wall. Wall in question is in photo 3 below, attached to existing railing in that photo.
Roof is wood trusses, house built in 1977 (Canada), and there is a kitchen wall underneath that runs perpendicular to trusses but is off centre of trusses (as seen in the railing photo attached). Plus the wall does not run full length of roof/trusses, it only supports about two thirds of roof as at far end it opens up for free flow dining room to living room. BUT complicating matters there is a single post in basement under the wall, though where it comes up supports the middle of a double-wide cold air return (centred between the two tapemarks in ‘flashlight’ photo) so we are not certain if the post is part of a load bearing element too or what its purpose is in basement.
One renovation company quoting the broader reno job says wall in question is ‘probably not load bearing but engineer would say for sure’, while another renovation co quoting says they are 99% sure wall IS load bearing partly because of existence of that post in basement. We meanwhile are trying to anticipate what options we can consider if it is load bearing as we still plan to have a wall under that roof, running same length, but our plan is to move wall to left two feet. As can be seen the in photo showing alignment of truss and wall (took photo looking straight on at truss): at present the wall is to right of centre of truss, while in our prelim reno plan we would move it two feet to left - to widen kitchen - and as a result the wall would run in same orientation and still be off centre from centre of truss, just now a foot to left of centre instead of a foot to right. New potential wall location can be seen in the taped double line demarcating the wall, on carpeted floor (behind the 'Cook’top and 'Ov’en). But we hadn’t planned on putting a new post in basement (though maybe that is necessary to make this all work?) Would appreicate any thoughts on this - I know only an engineer can say for certain based on site visit, but I would like to be modestly informed ahead of time since I as a homeowner haven’t had to deal with this type of renovation before and want to have some gauge whether this is $ or $$$$$! (and to know what questions to ask or things to consider) Thanks in advance.
PS Other than the aforementioned cold air return running perpendicular under that wall, no other things in that wall besides electrical - no plumbing stack or venting etc.